Device for making hypodermic injections



R. G. J. McENTIRE.

DEVICE FOR MAKING HYPODERMIC INJECTIONS.

APPLICATION FILED APR. 16, 1918.

Patented Apr. 27, 1920.

UNITED STATES PATENT OFFICE.

RONALD GORDON JOHN MOENTIRE, 0F DUBLIN, IRELAND.

DEVICE FOR MAKING HYPODERMIG INJECTIONS.

Application filed April 16, 1918.

To all whom it may concern:

Be it known that I, RONALD GORDON JOHN MOENTIRE, of 23 Pembroke Park,Dublin, Ireland, have invented a new and useful device for makingHypodermic Injections; and I do hereby declare the following to be afull, clear, and exact description of the same.

This invention relates to devices of the kind for making hypodermicinjections wherein a tubular glass receptacle contain ing the injectionis provided with a plug forming a rodless piston.

The main object of my invention. is to provide a device of this kindwhich is not only entirely self contained but is ready for instantaneoususe, is perfectly reliable in action, and can be produced at acomparatively low cost.

In the accompanying drawings Figure 1 is a central, longitudinalseetional view of my improved device.

Fig. 2 is an elevation of the same.

My improved device for making hypodermic injections as here showncomprises a cylindrical portion a of sufficient size to contain therequired dose and provided with a plug Z) of neutral rubber tightlyfitting the bore of the portion a. One end of the portion a is taperedand'the hypodermic needle 0 is fused into this tapered end with itspassage communicating with the interior of the cylindrical portion a.The other end of said receptacle a is funnel-shaped as at (Z and isconnected to said receptacle by a neck m. Said funnel d prevents thefingers from slipping and insures a firm grip of the device.

By providing this neck the rear end of the device can be left open butthe bore of the neck may if desired be sealed by a film of wax or thelike or the rear of the end (5 may be covered by a film Z of celluloseor the like. The rear end of a cover 9 which incloses the needle abutsagainst the front end of the receptacle a and a hermetic joint is formedby a tubular sleeve 70 of cellulose or the like which also retainsthecover 9 in Specification of Letters Patent.

Patented Apr. 27, 1920.

Serial No. 228,938.

position. comparatively slight pull on the cover 9 will remove the sameand also the sleeve is which is prevented from leaving the cover 9 bythe taper formation of the cover 9. This sleeve may be slipped intoposition on the cover after it has been made adhesive. A film ofmaterial may be wrapped around the cover 9 and reduced end j of the parta to form a sleeve. The bore of the reduced end j is of less diameterthan the needle, and by covering the end thereof the end j preventsrusting of the needle, if the latter is of corrodible material.

The needle may be of ordinary steel or it may be formed of anon-rustable steel alloy.

I claim:

1. A device for making hypodermic injections comprising in combination,a receptacle, a plug of resilient neutral material in said receptacleforming a rodless piston therein, a neck on the rear end of saidreceptacle, a flange on said neck, a neck at the front end of saidreceptacle, a hypodermic needle permanently secured in the second namedneck, a cover abutting against the front end of the second named neck,and a sleeve encircling the second named neck and said cover wherebysaid cover is hermetically secured to the second named neck, for thehereinbefore specified purpose.

2. A device for making hypodermic injections comprising in combination,a receptacle, a plug of neutral material in said receptacle, a neck atthe upper end of said receptacle, a funnel shaped flange on said neck, afilm of cellulose material secured to said flange and forming a hermeticclosure of said rear end, a hypodermic needle at the front end of saidreceptacle and a needle cap at the front end of said receptacle for thehereinbefore specified purpose.

In testimony whereof I aflix my signature in presence of two witnesses.

RONALD GORDON JOHN MCENTIRE.

' Vitnesses:

VIOLET HOLLOWAY, FERDINAND B. BOSSHARDT.

